Manly ignorance: When it's manly to be ignorant of a particular subject, since real men are too busy smoking cigars, lifting weights or cleaning remnants of motor oil, red meat, wood chips and gunpowder from their beards to be in situations where they can hear about that kind of shit.

Man with mignorance: "Of course I know what twilight is... wait, you're telling me that there's a popular romance book and movie series about teenaged vampires? Hmm... sounds pretty fucking queer. Now pass the scotch."